A roof garden is a garden planted on the roofs of buildings, also known as rooftop farming. A roof garden is not only decorative but also offers other benefits such as providing food for human consumption and adding a natural habitat for wildlife, mainly birds. Plants are usually grown with hydroponics, aeroponics, or air-dynaponics. Container gardening with soil may also be used. Vertical gardening will allow for more plant production in a small area.
Completing the gardening cycle...

Vermicompost is composting with the use of special earthworms. Red wigglers and white worms are the more common worms used, although European night crawlers can be used as well. Red wigglers can be found living in manure piles and in rotting vegetation and adapt the best in covered worm bins. Common earthworms burrow deeply and are not recommended for use in compost bins. Blue worms are commonly used in the tropics.
Worms are used to decompose vegetable and food waste along with bedding...

Image Caption: Compost barrel with compost and tools. Credit: Diego Grez/Wikipedia
Compost is fertilizer made from decomposed organic matter that is then tilled directly into the soil or used as an additive when transplanting seedlings. Composting can be very simplistic or complex, depending on the amount of compost needed. Compost is widely used in organic farming because of its high nutrient content and natural pesticide abilities.
Composting is simply piling, systematically,...

Agronomy for Sustainable Development is a peer-reviewed scientific journal published by Springer Science+Business Media. The journal was founded in 1981, at which time less than 10 percent of published material was in English. The journal underwent a series of major changes from 2003 to 2006, including the addition of extra field editors, switching from hardcopy to full electronic managing, producing all English material, and setting up a pre-selection committee at the submission stage....

A pivoted catch designed to fall into a notch on a ratchet wheel so as to allow movement in only one direction (e.g. on a windlass or in a clock mechanism), or alternatively to move the wheel in one direction.